I was interested in the concept of this book, but I found it to be too broad / inaccurate for someone with background knowledge in linguistics (and probably too technical for someone without). I also was quite disappointed in the coverage of some of the languages, specifically the chapter on Swahili which spent a lot of time focused on an anecdote about a person who spoke many African languages, none of which were Swahili. Overall it was a very Western-centric view.